Omeros Announces Closing of $16.2 Million Registered Direct Offering of Common Stock

SEATTLE, May 14, 2013 /PRNewswire/ -- Omeros Corporation (NASDAQ: OMER) today reported that it closed the registered direct offering of 3,903,004 shares of its common stock that was announced on May 9, 2013. The shares were sold at a price of $4.14 per share, which represented a two percent premium over the closing price on May 8, 2013. The shares were sold directly to affiliates of RA Capital Management and other investors without an underwriter or placement agent. Omeros received net proceeds from the offering of approximately $16.1 million, after deducting estimated offering expenses.

Omeros intends to use the net proceeds of the offering for general corporate purposes, including expenses related to the potential commercialization of OMS302 for intraocular lens replacement, as well as for research and development expenses, such as funding planned clinical trials for its OMS103HP, PDE10, MASP-2 and PDE7 programs. The net proceeds may also be used to fund pre-clinical studies, capital expenditures, working capital and to otherwise advance Omeros' potential products towards commercialization.

About Omeros CorporationOmeros is a clinical-stage biopharmaceutical company committed to discovering, developing and commercializing products targeting inflammation, coagulopathies and disorders of the central nervous system. The Company's most clinically advanced product candidates, OMS302 for lens replacement surgery and OMS103HP for arthroscopy, are derived from its proprietary PharmacoSurgery™ platform designed to improve clinical outcomes of patients undergoing a wide range of surgical and medical procedures. Omeros has five clinical development programs. Omeros may also have the near-term capability, through its GPCR program, to add a large number of new drug targets and their corresponding compounds to the market. Behind its clinical candidates and GPCR platform, Omeros is building a diverse pipeline of protein and small-molecule preclinical programs targeting inflammation, coagulopathies and central nervous system disorders.

Forward-Looking StatementsThis press release contains forward-looking statements as defined within the Private Securities Litigation Reform Act of 1995, which are subject to the "safe harbor" created by those sections. These statements include, but are not limited to, statements regarding the expected use of proceeds from the registered direct offering. Forward-looking statements are based on management's beliefs and assumptions and on information available to management only as of the date of this press release. Omeros' actual results could differ materially from those anticipated in these forward-looking statements for many reasons, including, without limitation, the risks, uncertainties and other factors described under the heading "Risk Factors" in the Company's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on May 9, 2013. Given these risks, uncertainties and other factors, you should not place undue reliance on these forward-looking statements, and the Company assumes no obligation to update these forward-looking statements publicly, even if new information becomes available in the future.